JPS642788B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a wind turbine device suitable for use in wind power generation.

Wind turbines have been used on a small scale in regions where the wind blows frequently throughout the year, but their widespread use has been slow due to the small amount of power that can be obtained relative to the equipment and the instability of the direction and strength of the wind. Ta.

However, in the recent times when energy saving is being pursued, it has been reconsidered and proposals have been made to overcome the above-mentioned drawbacks.

Wind turbines can be broadly divided into horizontal axis types and vertical axis types, but regarding the above-mentioned point that the direction of wind blowing is not determined, vertical axis types are essentially independent of the direction in which the wind blows. This is advantageous because it can be operated.

In addition, regarding the issue of uncertain wind strength, efforts should be made to enable operation from low wind speeds as much as possible, and during strong winds, measures should be taken to ensure the safety of the wind turbine by suppressing or stopping the flow of wind into the wind turbine. In this case, energy can be obtained relatively continuously.

The present invention relates to an improvement of a vertical axis type wind turbine that has been made in consideration of the above points, and particularly aims to provide a wind turbine device that is efficient in terms of equipment and can be operated from low wind speeds. The gist is a windmill in which a plurality of buckets are arranged radially at predetermined intervals around a vertical rotation axis, and a windmill that rotates the windmill to create a structure in which the circumference of the bucket is drawn along the circumference of the outer end of the bucket. In a wind turbine device comprising a plurality of guides arranged at predetermined intervals in a substantially tangential direction, each bucket has a guide extending from near its outer end toward the approximate center of another bucket adjacent in the direction of rotation. A bucket guide is attached to the bucket guide, and the air that flows into the bucket from between the guides is separated from the air that is reversed in the bucket and flows out in the opposite direction, so that they do not interfere with each other. The reason is that I tried not to do that.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 and 2 are a conceptual horizontal sectional view and an elevational view, respectively, showing one embodiment of the present invention. 1 in the diagram
is a vertical rotation axis of the wind turbine according to the present invention, around which a plurality of buckets 2 supported by the rotation axis 1 by support rods 3 are arranged radially evenly around the rotation axis 1. They are arranged at intervals to form the main body of the windmill.

In this embodiment, each bucket bag 2 has a substantially semicircular cross-sectional shape and extends in the long side direction, and all curved inner surfaces that receive wind are arranged in the same direction.

In addition, on the opposite side of the airflow surface of each bucket 2,
A bucket guide 4 is provided near the outer end and extends a predetermined distance toward the center of the circle of the next bucket 2' adjacent in the rotating direction.

A plurality of movable guides 5 are disposed on the outside of the bucket 2 at equal intervals in a substantially tangential direction of the circumference along the circumference drawn by the outer end of each bucket due to the rotation of the windmill.

Each movable guide 5 is fixed to a rotation shaft 7 and is rotatable around the rotation shaft 7. Note that the upper and lower ends of the vertical rotation shaft 1 are connected to bearings 1 as shown in FIG.
1, and the upper and lower ends of the rotating shaft 7 are also rotatably supported by bearings 12.

The rotation shaft 7 is arranged slightly eccentrically inward from the center of the movable guide 5, and the rotation shaft 7
A spring 9 is attached to the end of the movable guide 5 through a bracket 8, and the tension of the spring 9 causes the movable guide 5 to be positioned in the tangential direction mentioned above under normal low wind speed conditions.

Each movable guide 5 has a bent portion 1 at a part of its outer end that can apply rotational force to the guide by wind.
0 is set. The bending portion 10 is connected to the movable guide 5
It may be provided over the entire vertical length of.

The same number of fixed guides 6 are arranged outside the movable guides 5 on an extension line of each guide 5 in the normal position.

The fixed guide 6 has air guide plates 1 disposed at its upper and lower ends in a direction expanding outward, as shown in FIG.
7 and 17, and is fixed integrally with the baffle plate 17.

Further, reference numeral 13 in FIG. 2 is a pulley attached to the lower end of the vertical rotating shaft 1, and is connected to a pulley 14 attached to the generator 15 by a belt 16 or the like.

Further, 18 is an upper and lower frame supporting the wind guide plate 17, and 19 is a support for the wind turbine device.

In addition, in FIG. 2, the bucket belt 4 and bucket support rod 3 are omitted.

Next, the operation of the wind turbine device in this embodiment will be explained.

As shown by the dotted line in Figure 1, assuming that the wind is blowing from below in the figure, b
The range from to c, or in Figure 2, b, b',
The wind in the range c' and c is caught by the baffle plate 17 and the fixed guide 6, and then in the case of this embodiment, it is caught at three locations formed by four sets of movable guides 5 and three sets of bucket guides 4. The wind passes through the wind introduction passages 20, 20', 20''.

During this time, the wind passage 20 is gradually narrowed,
The wind speed increases in inverse proportion to this, hits the wind receiving surface of the bucket 2, rotates the bucket 2 due to wind pressure, reverses in the direction of the arrow, and flows out toward the back side of the adjacent bucket guide 4. In other words, it operates in a similar relationship to the nozzle of a Pelton turbine. However, since there is a bucket guide 4, the wind is
The reverse wind does not hit the entire wind receiving surface of the bucket, and the incoming wind is separated by the guide 4 and flows out without colliding with the inflowing wind, so there is no disturbance to the wind inflow speed, and the strongest reaction to the bucket 2 is achieved. Because it provides power and increases rotation, the rotational efficiency is significantly improved compared to conventional wind turbines.

In addition, when the tip of the bucket 2 and the inner end of the movable guide 5 are aligned as described above,
Since the entire amount of wind passing through the wind introduction path 20 flows into the corresponding bucket 2 and reverses and flows out, it is efficient like a Pelton water wheel, but this relationship does not change even if the above position is shifted.

In other words, even when the bucket 2 rotates to an intermediate position between the ends of two adjacent movable guides 5, a portion of the wind passing through the introduction path 20 is directed to one bucket 2.
Then, the remaining air is applied to the next bucket 2, so the overall air volume per bucket 2 does not change from beginning to end, and the efficiency also does not change as long as the air volume and wind speed are constant.

Furthermore, when the wind speed exceeds a preset wind speed, the movable guide 5 is moved so that the counterclockwise rotational force in FIG. , and rotates to a position 5a as shown by the imaginary line in the figure, gradually narrowing the introduction passage 20 and restricting the inflow of wind.

If the wind speed further increases, the movable guide 5 rotates further in proportion to this, and can almost completely block the inflow of wind, making it possible to prevent the wind turbine body from over-rotating. Stay safe.

The rotational force applied to the movable guide 5 during the strong wind becomes weaker as the guide 5 becomes more parallel to the wind direction, but on the other hand, a larger rotational force is additionally applied to the bending portion 10. No problem.

In this embodiment, as described above, the projected area of the wind turbine body (d, in Fig. 2,
d', e', e), and catch the wind blowing over a much larger area (b, b', c', c in Figure 2), increase the speed, and make the entire wind force hit Bucket 2. Therefore, it can be operated from extremely low wind speeds.

Also, the areas b, b′, c′, which catch the wind mentioned above,
Since c can be arbitrarily set to be larger than the projected area of the wind turbine main body, the cost is lower than increasing the size of the wind turbine main body, and the operating rate is much improved compared to conventional wind turbines.

Therefore, by operating the generator 15 or other load through the vertical rotation shaft 1 and the pulleys 13 and 14 using the power recovered by the bucket 2, an efficient wind power generation energy device can be realized.

Note that the number of installed buckets 2, movable guides 5, fixed guides 6, etc. can also be set arbitrarily, and may be determined according to design conditions. Further, the above-mentioned bent portion may be modified in various ways without changing the gist of the present invention, such as by integrally attaching a separate component to the movable guide 5.

Furthermore, by installing appropriate wind speed sensors and load sensors, the optimal angular position of each movable guide 5 is determined from the wind speed and load, the movable guides are mechanically operated, and the inflow speed is automatically controlled to maintain a constant speed. It is also possible to control the rotation, and such constant rotation control is particularly desirable for high-output wind turbines.

In the present invention configured as described above, a guide capable of capturing wind force having a larger area than the proportion of the size of the wind turbine body is provided, the guide is compressed and accelerated, and the bucket guide By greatly increasing the rotational efficiency of the bucket, it is possible to provide an inexpensive wind turbine device that can operate even at low wind speeds, making it extremely practical and useful.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a conceptual horizontal sectional view of the wind turbine device, and FIG. 2 is an elevational view thereof. 1...Vertical rotation axis, 2...Bucket, 3...Support rod, 4...Bucket guide, 5...Movable guide, 6...Fixed guide, 7...Rotation axis, 10...
Bending part.

Claims (1)

[Claims] 1. A windmill in which a plurality of buckets are arranged radially at predetermined intervals around a vertical rotation axis, and a circle drawn along a circumference drawn by the outer end of the buckets as the windmill rotates. In a wind turbine device comprising a plurality of guides arranged at predetermined intervals in a substantially tangential direction of the circumference, each bucket has a guide extending from near its outer end toward approximately the center of the adjacent bucket in the direction of rotation. A bucket guide is provided, and the air flowing in toward the bucket from between the guides and the air that is reversed within the bucket and flowing out in the opposite direction are separated by the bucket guide so that they do not interfere with each other. A windmill device characterized by: 2 The above-mentioned guide consists of a movable guide on the inner circumference side and a fixed guide on the outer circumference side, and the above-mentioned fixed guide is fixed integrally with a wind guide plate arranged in the direction of expanding outward at the upper and lower ends thereof. 2. The wind turbine device according to claim 1, wherein the movable guide rotates about its rotation axis to adjust the air volume and control the number of rotations of the wind turbine or prevent over-rotation. 3. The wind turbine device according to claim 2, wherein the movable guide is rotatably arranged around a vertical rotation axis eccentrically arranged inward. 4. The movable guide is provided with a bent part on a part or all of its outer end, which can apply rotational force to the guide by wind force.
The wind turbine device described in Section 1. 5. The wind turbine device according to any one of claims 1 to 4, wherein the bucket has a substantially semicircular cross-sectional shape.